After this whole stuff I want to put on top of everything an other jinternalframe which will be a webpage ( i use webrenderer ) the page would have a unique background color and i would like to catch this graphics before its painting on the screen , catch this color and put a transparent color instead.
like that it will be a sandwich : web background , clients, web transparent overlay.
Someone know how to catch the result who will be print on the screen before it is printed ?